Locator/ID Separation Protocol (LISP) Impact
RFC 7834

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Internet Engineering Task Force (IETF)                         D. Saucez
Request for Comments: 7834                                         INRIA
Category: Informational                                       L. Iannone
ISSN: 2070-1721                                        Telecom ParisTech
                                                             A. Cabellos
                                                                F. Coras
                                       Technical University of Catalonia
                                                              April 2016

              Locator/ID Separation Protocol (LISP) Impact

Abstract

   The Locator/ID Separation Protocol (LISP) aims to improve the
   Internet routing scalability properties by leveraging three
   principles: address role separation, encapsulation, and mapping.  In
   this document, based on implementation work, deployment experiences,
   and theoretical studies, we discuss the impact that the deployment of
   LISP can have on both the routing infrastructure and the end user.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Not all documents
   approved by the IESG are a candidate for any level of Internet
   Standard; see Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc7834.

Saucez, et al.                Informational                     [Page 1]
RFC 7834                       LISP Impact                    April 2016

Copyright Notice

   Copyright (c) 2016 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  LISP in a Nutshell  . . . . . . . . . . . . . . . . . . . . .   4
   3.  LISP for Scaling the Internet Routing Architecture  . . . . .   5
   4.  Beyond Scaling the Internet Routing Architecture  . . . . . .   6
     4.1.  Traffic Engineering . . . . . . . . . . . . . . . . . . .   8
     4.2.  LISP for IPv6 Co-existence  . . . . . . . . . . . . . . .   8
     4.3.  Inter-domain Multicast  . . . . . . . . . . . . . . . . .   9
   5.  Impact of LISP on Operations and Business Models  . . . . . .  10
     5.1.  Impact on Non-LISP Traffic and Sites  . . . . . . . . . .  10
     5.2.  Impact on LISP Traffic and Sites  . . . . . . . . . . . .  11
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  12
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  13
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .  13
     7.2.  Informative References  . . . . . . . . . . . . . . . . .  14
   Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . .  17
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  18

Saucez, et al.                Informational                     [Page 2]
RFC 7834                       LISP Impact                    April 2016

1.  Introduction

   The Locator/ID Separation Protocol (LISP) relies on three principles
   to improve the scalability properties of Internet routing: address
   role separation, encapsulation, and mapping.  When invented, LISP was
   targeted at solving the Internet routing scaling problem [RFC4984].
   There have now been years of implementations and experiments
   examining the impact and open questions of using LISP to improve
   inter-domain routing scalability.  Experience has shown that because
   LISP utilizes mapping and encapsulation technologies, it can be
   deployed and used for purposes that go beyond routing scalability.
   For example, LISP provides a mean for a LISP site to precisely
   control its inter-domain outgoing and incoming traffic, with the
   possibility to apply different policies to different domains
   exchanging traffic with it.  LISP can also be used to ease the
   transition from IPv4 to IPv6 as it allows the transport of IPv4 over
   IPv6 or IPv6 over IPv4.  Furthermore, LISP also supports inter-domain